/**
 * lerp — exponential interpolation helper for canvas motion.
 *
 * Moves a value a fixed fraction of the way toward a target each frame,
 * producing smooth ease-out movement between tick snapshots.
 *
 * Architecture: used by SimCanvas to animate agents and camera.
 *
 * Design: a pure function with no state; callers hold the current value.
 */

export function lerp(current, target, factor) {
  return current + (target - current) * factor;
}